| 浅层地下目标时域电磁散射问题的数值模拟 |
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| 引用本文： | 方广有,张忠治,汪文秉.浅层地下目标时域电磁散射问题的数值模拟[J].电子与信息学报,1996,18(3):276-282. |
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| 作者姓名： | 方广有 张忠治 汪文秉 |
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| 作者单位： | 中国电波传播研究所，中国电波传播研究所，西安交通大学 新乡 453003，新乡 453003，西安 710049 |
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| 摘 要： | 本文用时域有限差分法(FD-TD法)计算了浅层地下目标的时域电磁散射。在地下色散媒质的参数ε_r(ω)和μ_r(ω)都是以Debye方程表示时,推出了FD-TD法的迭代分式,并给出了相应的吸收边界条件。通过将FD-TD法计算的结果与其它结果相比较,证实了该方法对计算有耗媒质中电磁场问题的有效性。对瞬态脉冲在色散媒质中的传播特性进行了讨论。分别计算了典型地下目标的时域散射波形和波形堆积图。
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| 关 键 词： | 时域有限差分法 色散媒质 埋地目标 瞬态脉冲 电磁散射 |
| 收稿时间： | 1994-5-24 |
| 修稿时间： | 1994-11-1 |
NUMERICAL SIMULATION OF TIME-DOMAIN EM SCATTERING BY SHALLOW SUBSURFACE OBJECTS |
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| Fang Guangyou,Zhang Zhongzhi,Wang Wenbing.NUMERICAL SIMULATION OF TIME-DOMAIN EM SCATTERING BY SHALLOW SUBSURFACE OBJECTS[J].Journal of Electronics & Information Technology,1996,18(3):276-282. |
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| Authors: | Fang Guangyou Zhang Zhongzhi Wang Wenbing |
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| Affiliation: | China Research Institute of Radiowave Propagation, Xinxiang 453003;Xi'an Jiaotong University, Xi'an 710049 |
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| Abstract: | The time-domain Electromagnetic(EM) scattering by buried objects in dispersive media is calculated by using FD-TD method. The FD-TD formula in Debye dispersive media(both the complex permeability and the complex permittivity are described by Debye equations) are deduced, and the absorbing boundary condition is given. The validity of FD-TD method in lossy media is verified through comparing the FD-TD's result and other one. The propagation of transient pulses in dispersive media is studied in detail. The scattering pulses and the wiggle traces for typical buried objects are given. |
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| Keywords: | FD-TD method Dispersive media Buried objects Transient pulse Electromagnetic scattering |
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